<template>
  <el-aside :width="$store.state.isCollapse ? '180px' : '64px'">
    <el-menu class="el-menu-vertical-demo" background-color="#545c64" text-color="#fff"
      :collapse="!$store.state.isCollapse" :collapse-transition="false">
      <h3 v-show="$store.state.isCollapse">后台管理</h3>
      <h3 v-show="!$store.state.isCollapse">后台</h3>

      <el-menu-item :index="item.path" v-for="item in noChildren()" :key="item.path" @click="clickMenu(item)">
        <component class="icons" :is="item.icon"></component>

        <span>{{ item.label }}</span>
      </el-menu-item>
      <el-sub-menu :index="item.label" v-for="item in hasChildren()" :key="item.path">
        <template #title>
          <component class="icons" :is="item.icon"></component>
          <span>{{ item.label }}</span>
        </template>

        <el-menu-item-group>
          <el-menu-item :index="subItem.path" v-for="(subItem, subIndex) in item.children" :key="subIndex"
            @click="clickMenu(subItem)">
            <component class="icons" :is="subItem.icon"></component>
            <span>{{ subItem.label }}</span>
          </el-menu-item>
        </el-menu-item-group>
      </el-sub-menu>
    </el-menu>
  </el-aside>
</template>

<script>
import { useRouter } from 'vue-router'
import { useStore } from 'vuex'
export default {
  setup() {
    const store = useStore()
   
    const router = useRouter()

    // 是否有二级菜单
    const noChildren = () => {
      return asyncList.filter((item) => !item.children)
    }

    const hasChildren = () => {
      return asyncList.filter((item) => item.children)
    }

    const asyncList = store.state.menu

    const clickMenu = (item) => {
      router.push({
        name: item.name
      })
      // vuex 来管理
      store.commit('selectMenu',item)
    }

    return {
      noChildren,
      hasChildren,
      clickMenu
    }
  }
}
</script>
<style lang="less" scoped>
.icons {
  width: 18px;
  height: 18px;
}

.el-menu {
  border-right: none;

  h3 {
    line-height: 48px;
    color: #fff;
    text-align: center;
  }
}
</style>
